Automatic telephone calling device.



P. RIGHARDT. y AUTOMATIC TELEPHONE CALLING DEVICE.

APPLgoATIorL FILED Nov. 2s, 1912.

1,121,400, Pateneanee-15,1914

4 SHEETS-SHEET 1.

Y P. RIGHARDT. AUTOMATIC TELBPHGNE CALLING DEVICE.

APPLICATION FILED HOV. 25, 1912.

Patented Dec. 15, 1914.

4 SHEETS-SHEET 2.

um. am

www

Mvm WW,

w QN N E. n N

m .wNNm

1. RICHARDT.

AUTOMATIC TELEPHONE CALLING DBVIUB.

APPLIOATION FIED NOV. 26. 1912.

Patented Dec. 15, 1914.

SHEETS-SHEET 3.

A P. RIGHARDT. AUTOMATIC TELEPHONE GALLING DEVICE.

` APPLICATION FILED NOV.,26, 1912. "1,121,400,

Patented Dec.`15,1914.

4 SHEETS-SHEET 4.

Fig?

UNITED -sTATEs PATENT oEEIoE.

PHILIP RICHARDT, 0F PRAGUE-KAROLINENTAL, AUSTRIA-HUNGARY, ASSIGNOR T0 v ZIVNOSTE'NSKA BANKA, 0F PRAGUE, .AUSTRIA-HUNGARY.

AU'TOIMIIAJFIIIC TELEPHONE CALLING DEVICE.

Specicatln of Letters Patent.

Patenten Dec. 15, 1914..

Application lled November 25, 1912. Serial No. 733,461.

[o all whom t may concern Be it known that I, PHILIP RICHARDT, subject of the King of Sweden, residing at Prague-Karolinental, Rokycangasse 32, Bohemia', State of Austria-Hungary, have invented .certain new and useful Improvements in Automatic Telephone Calling Devices, of which the following is a specification.

The number switch hitherto used and which is provided with a finger disk has been substituted already by many other devices, which facilitate the adjusting-of the desired number. But the manipulation at the said number switches yet remains complicated in comparison with hand operated systems and may sometimes give rise to misswitchings. The winding up of the said apparatuses by turning a crank must be regarded as being analogous with the movement of the inductor crank at the hand stations.

The object of the present invention is to render the manipulation at the automatic subscribers stations likewise as simple as in the case with the above named apparatuses, that is in such a manner that after the adjustment of the selecting device the seeking for the subscriber and the calling of the same will be effected merely by taking off the receiver. Therefore the arrangement is such that on suspending the receiver av spring will be tensioned, which, on takingol" the receiver in case the selecting device is adjusted causes the transmitting of current impulses. The apparatus, is furthermore arranged in such manner that the l transmitting of current impulses does not take place when the receiver is taken oil' in order to answer a call received at the particular telephone. The arrangement, is furthermore such that the action of suspending the receiver upon its hook automatically returns the selecting device to the l device. Fig. ShOWS the levers for releas-l position of rest or what may be' term idle position.

An example of the invention is illustrated in the annexed drawings.

Figure 1 shows the complete apparatus in elevation. Fig. 2 is a plan view, Fig. 3 a side elevation with the levers for releasing the clock workl and Fig. 4 a side elevation with the levers for releasing the selecting din ing the clock work in the different positions and Fig. 6 the levers for releasing the selecting device in the different positions. In the drawings it is assumed that a pushbutton selecting device is used and the impulse transmitting device consists of a transmitter' and an additional switch, such as the devices shown inmy copending application bearing the Serial No. 708,507, the connections and wiring being likewise thereshown, the movable contacts ofwhich are secured upon the shafts 1 and 2 the shaft 1 being obliged to make one revolution and the shaft 2 to make three revolutions every time. As a matter of course a single impulse transmitter making only one revolution may also be used, and alsoyother convenient arrangements with suitable gearings etc may be made use of.

The receiver hook 3 (Figs. 1, 2) is capable of being turned about an axis 4 and is by means of a pin or projection 5 coupled, so

toothed segment 6, upon whichthe driving spring 7 acts, so that the receiver hook 3 movin down. carries with it the segment 6, but being drawn by the spring 8 into a position indicated by dotted lines (Fig. 1) is allowed to perform this movement without any hindrance. The segment 6 engages a pinion 9 provided with a ratchet clutch 10 working in one direction. The pinion 9 is pressed by means of the spring 11 toward the second part of the clutch 10, with which the toothed wheel 12 is rigidly connected. The wheel 1.2 engages a pinion 13, which together with the wheel 14 and the locking disk 15 is rigidly secured upon the axle 1 which performs only one revolution. The wheel 14 engages a pinion 16 which corresponds to the above mentioned ratio of gearing and is mounted uponthe shaft 2, from which a suitably constructed train of wheels 17, 18, 19 and 20 a fan wheel 21 is driven. The clock work is locked at the disk 15 by means of the lever 22, which engages the said disk and is capable of revolving about the axle 32 (Fig. 5).

The-push button selecting device may be imagined for example as being provided with push-buttons or the like which are arranged in rows corresponding to position values and release each other 1n rows i. e. if a push button .0f one row is in depressed position as to work only in one direction, withl a and another push button of the same row will be depressed the first named button will be released. I

The clock work and selecting'A device are connected With each other mechanically in such manner that 1, during the adjusting of the selecting device the releasing of the clock-work is prepared; 2, on taking oil'l the receiver the clock work will be released and 3, ony suspending again the receiver the selecting device will be restored and the driving springr tensioned again.

In order to suit the first .requirement stirrups 2.3 (Figs. 1, 3| and 5.) are provided at,the`.selecting device, ,the said stirrups being in the lowermost position in case the buttonsare in their position of rest, but engaging heedge ofthe conev or tooth 24, in case one bar.2 5 in connection with the stirrup 23 by means of a pin 47 will be lifted, so that the said bar lifts by its lug 26 the pin or projection 27 of a lever 28. By the lever 28 and the lever 29 which are fixed together upon the same Ashaft 31, and by means of a bar 30a twoarmed lever 33 is moved about the shaft 32. The lever 33 has on one arm a lug 34 and at the end of the other arm a pin .35, which is arranged in the saine level with the receiver hook 3 and is moved duringI the described movement of the-lever system above the sloping curved surface of a lugy 36 secured laterally on the receiver hook, as is shewnbyfull lines in Fig. 5. If .now the receiver is taken off, 'after the ,remaining push buttons necessary ,for'selecting a number have been depressed, the receiver 4hook 3 will be pulled bythe spring ,8 ,and carried into the position indicated .by dotted lines, whereby the pin35 is forced to slide over the Iface 4df :the lug 36. The lever 33 is thereby .forced .to .move .farther laterally so that it carries with lit byits lug/34 the locking lever 22 which` releases the disk 15 and therefore releases the clock l'work (Fig. 5,

dotted lines). Thesegmente win ,their bey `moved by the driving spring .7 and lifts finally thereceiver hook `by means of thepin 5 into the uppermost position indicated by the upper dotted center line (Fig. r1). Meanwhile the lever 33 and ltherefore ,also

the locking lever 22 are released again, and i the ,said locking lever being pressed by means .of the spring 37 toward the `disk 15 will then lockthe disk 15 again as soon as it has performed Ia complete revolution. l If nowthe receiver be lsuspended again, it pulls the receiver hook down owing 'to its weight. The said hookpushes with its sloping lug 38 against a pin 39 carried-by the lever 4,0,. and therefore presses land moves the said lever 40sidew1se, which transmits the motion by means of a link 41 tothe lever 42 and the lever 43.the said two leversbeiii., g'I :fixed upon the same ais of rotation. The lever 43,

utton is being' depressed," whereby av illustrated.

l`stirrups which also effect the mutual releasing of the buttons of one and lthe same row and which, bydepressing thebiittons, have been dropped behind the cone or tooth 24 of tle depressed button, release the last.r named button again. Therefore the stirrups 23 return back into their ylovvermost position and the entire lever system actuated. by the same moves back again -intol Sits position' Of rest shown in Fig. 1,.so thatthe ,receiver hook 3 returns ,in- .its initial position, the lue` 36 moving` so that lit does not meet ,the rin 35.

If the. receiver ,be .taken oil Iin case the selecting device had not been adjusted previously, for example, in oase a subscriberl had been called,the receiver hook will be piilled bythe 'spring-8 only'into .the position .indicated by dotted lines in Eig. 1, ,but its lug 36 does notmeet at all the pin 35 daring the said .movement The pin 39 .likewise does v not come in contact with the lug 38, the spring .8 having-lifted the vhook lever 3just only up vto the position indicated by dotted lines. This hasfer its object l.to prevent the button releasing device from'goinginto action by merely taking oi-l the receiver, for the reason that in ,this .case .the ,receiver hook has only to actuate 'the hook switch no t l ulationwillb'e compensated, without having any linjurious:iniiuence upon the following action ofthe apparatus.

It .is clearlyseen that alever or pointer like. or otherwise arranged'selecting device may [be connected .mechanically in the same manner .with .the clock work, therefore the said modilicationalso ,covered by the present `invention needs not to abe described and cluding a spring, a selector device, means to lock .said clock work releasably against operation, Amechanism connected te said means and operable by the operation of the `selector device to release said clockwork, a receiver arm, and means controlled by the movement of the receiver arm to tension said spring.

2. .a device of the kind described, the combination of a clockwork Inechanismincluding .a .sprng, ,a 4selector device, means to lock said clockwork releasably against means and operable by the operation of the selector device to release said clockwork, a

receiver arm, means controlled by the movement of the receiver arm to tension said spring, and other means for restoring the selector device to original position after operation operable by movement of said receiver arm.

3. In a device of the kind described, the combination of Va clockwork mechanism including a spring, a selector device, means y to lock said clockwork releasably againstoperation, mechanism connected to said means and operable by the operation of the .selector device Vto release said clockwork, a receiver arm, and other means carried by the receiver arm and enga eable with the locking device to restore sai device to locking position upon movement of the receiver arm in one direction.

4. In a device of the kind described, the combination of a clockwork mechanism including a spring, a selector device, means to lock said clockwork -releasably against operation, mechanism connected to said means and operable by the operation of the selector device to release said clockwork, a receiver arm, means controlled by the movement of the receiver arm to tension said spring, other means for restoringthe selector device to original position after operation operable by movement of said receiver arm, and other. means carried by the receiver arm and engageable with the locking device to restore said device to locking position upon movement of the receiver arm in one direction. f

In testimony whereof -I have hereunto set my hand in presence of two subscribing witnesses,

PHD'JIP RICHARDT.

Witnesses SIGMUND BAUER AUGUST FUGGER. 

